My problem is ... I have lots of network mapped drive letters already. My external drives usually attach as drive E:, F:, G: or H:. (yes, the other drive letters are mapped to networked device over a VPN for my "day job"). Right now E: and F: are usually my card reader when that is attached. G: and H: are my 2TB external drives (H: is a backup copy of G: done weekly).
If I replace my G: drive with another drive containing old photos, wouldn't that mess up the catalog in LR? Any recommendations on how to juggle multiple external drives with LR (which potentially shares the same drive letter)?